1
var isPathCrossing = function (path) {
2
  let set = new Set();
3
  let curr = [0, 0];
4

5
  let start = `${curr[0]}, ${curr[1]}`;
6
  set.add(start);
7

8
  for (let el of path) {
9
    if (el === "N") curr[1]++;
10
    else if (el === "S") curr[1]--;
11
    else if (el === "E") curr[0]++;
12
    else curr[0]--;
13

14
    let key = `${curr[0]}, ${curr[1]}`;
15
    if (set.has(key)) return true;
16
    set.add(key);
17
  }
18

19
  return false;
20
};